Today, between Cangshan Lake and Erhai Lake in Dali, Yunnan, there are three white pagodas, which still stand tall despite thousands of years of storms and wind erosion. This is the famous three pagodas of Chongsheng Temple. The Three Pagodas of Chongsheng Temple is one of the oldest famous buildings in southern China. It is not only a symbol of Dali, but also a concentrated expression of ancient Yunnan history and culture. Chongsheng Temple and Three Pagodas were built in the late Nanzhao period by Sheng Fengyou (824 ~ 859), the tenth generation of Nanzhao.

The architectural style of the Three Pagodas is similar to that of the Little Wild Goose Pagoda in Xi 'an, which is a typical Tang Pagoda style, showing the exchange relationship between the mainland and Nanzhao in the Tang Dynasty. In the early Tang Dynasty, there were many Birdman and Baiman tribes around Erhai Lake in Dali, Yunnan. Among them, there are six tribes with the greatest influence, namely, Mongolian imperial edict, Yue imperial edict, Langchao imperial edict, Daoqi imperial edict, Shi Lang imperial edict and Mengshe imperial edict, which are collectively called "six imperial edicts". Imperial edict is the local language, which means king or region. Because Mengshe Zhao is located in the south of the Five Zhao Dynasties, it is also called "Nanzhao".

In the 23rd year of Emperor Taizong's Zhenguan (649), Xi Nuluo, the leader of the imperial edict of Mongolian society, established Great Mongolia, calling himself King of Qijia, and sent envoys to pay tribute to the Tang Dynasty. At that time, the Tubo forces were expanding to Yunnan and entering the northern part of Erhai Lake. In the face of the powerful offensive of Tubo, all the five imperial edicts except Nanzhao were attached to Tubo. Only Nanzhao was attached to the Tang Dynasty because it was the farthest from Tubo and was less threatened. In order to resist Tubo, the Tang Dynasty also strongly supported Nanzhao to carry out a unified war. During the reign of Emperor Xuanzong of the Tang Dynasty, Piluge unified six imperial edicts with the support of the Tang Dynasty.

In the 26th year of Kaiyuan (738), the Tang Dynasty made Piluoge the king of Yunnan, and his name was restored to righteousness. Pirog also built Taihe City (now Taihe Village, Dali, Yunnan) as the political center of Nanzhao, thus establishing Nanzhao State. Under the influence of the advanced culture of the Tang Dynasty, Nanzhao, after reunification, modeled on the Tang system and established a fairly complete political organization. Agriculture, animal husbandry, textile industry, felting industry and smelting and casting industry all developed greatly, and the social economy developed rapidly. However, after the founding of the People's Republic of China, Nanzhao began to have conflicts with the Tang Dynasty due to the continuous development of its power.

For more than a hundred years, the two sides fought in wars and wars. After the Anshi Rebellion, Nanzhao took the opportunity to expand its territory and often invaded the southwest border of the Tang Dynasty with the Tubo Coalition forces. In 779, in the fourteenth year of Dali, Ge Luofeng died and his grandson Yi Mouxun succeeded him. Unable to bear the cruel slavery of Tubo, in 793, Yi Mouxun sent three envoys to Chengdu and sent a letter to Wei Gaofa, our envoy in Nanxichuan, Shujian, expressing his willingness to submit to the Tang Dynasty. The following year, Wei Gao sent messengers to meet Nanzhao in Diancang Mountain and agreed to live in peace. Nanzhao, in order to show its determination to return to the Tang Dynasty, launched a war against Tubo after joining the League and captured Kunming City (now Yanyuan, Sichuan).

In the 11th year of Zhenyuan (795), Emperor Xuanzong of the Tang Dynasty made Yi Mouxun the Nanzhao King. In the seventeenth year of Zhenyuan (80 1), Nanzhao and Wei Gao joined forces to break Tubo, which was very controversial. Since then, the threat of Tubo to Nanzhao has been lifted, and Nanzhao has resumed good relations with the Tang Dynasty. However, in the literate Sect period, the relationship between Nanzhao and the Tang Dynasty was once again tense. In the third year of Taihe (829), Nanzhao attacked the Three Kingdoms of Tang Dynasty (ruling Yue, now Xichang, Sichuan), Rong (ruling Dao, now Yibin, Sichuan) and Qiong (ruling Qiong, now Qionglai, Sichuan), and then invaded the outer city of Chengdu, plundering tens of thousands of children, labor and treasures. Since then, Nanzhao has invaded the Tang Dynasty more frequently. In November of the first year of Emperor Xuanzong's Ganfu (874), Nanzhao invaded Xichuan again.

In order to fight Nanzhao with all one's strength, the Tang Dynasty ordered to mobilize troops from Hedong and Shannan East Road to fight in Xichuan. In the second year of Ganfu (875), the Tang Dynasty appointed Gao Pian as our ambassador, gave up and sent troops to attack Nanzhao. Gao Pian went to court, withdrew reinforcements from all walks of life, pursued Nanzhao to Dadu River with only 5,000 military forces, built castles in Nanzhao and sent troops to station. After Shilong died, his son Longshun sent messengers to make up with Tang. At this point, Nanzhao stopped its intrusion into the Tang Dynasty. In the first year of Emperor Xuanzong's reign in the Tang Dynasty (880), there was a big debate between the main peace faction and the main war faction in the Tang Dynasty. Finally, Xuanzong agreed with the opinion of the main peace faction, agreed with Nanzhao's personal invitation, did not force him to be a vassal, and gave him more gold and silk. In the third year of neutralization, Princess Anhua of the Tang Dynasty married Nanzhao. Since then, the Tang Dynasty and Nanzhao have finally entered an era of peaceful coexistence.